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Adjusting IOP after cataract surgery may lower risk of cystoid macular edema

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SAN FRANCISCO — Adjusting IOP after cataract surgery may lower the risk of postoperative cystoid macular edema, although further studies are necessary to determine the optimal adjusted postsurgical IOP.

In a prospective study of 170 eyes in 135 patients, an IOP lower than 16 mm Hg was associated with a 2.5 increase in the incidence of cystoid macular edema (P = .006). An IOP greater than 21 mm Hg was associated with risk for cystoid macular edema, though the correlation was not as strong (P = 0.15), John S. Jarstad, MD, said at the American Society of Cataract and Refractive Surgery meeting here.

A secondary finding in the study was that IOP on day 1 varied little from the immediate postoperative value. According to Dr. Jarstad, IOP varied between –5 and 5 mm Hg on day 1 from the postoperative value in 54 patients, between 6 and 15 mm Hg in 22 patients, and between –6 mm Hg and –15 mm Hg in 39 patients.

"I think it is important in patients with retinal disease or glaucoma, who are at risk for pressure damage, to measure them right after surgery instead of waiting for the next day," he said.